Hi bud i have always stuck with beta as the reliability is second to none. But its not just that i think that they are a pretty bike to look at, the power is not harsh and aggressive with any nasty bite to it.
And not so long ago i say a beta 250 08 immaculate condition that was at 2000 buy it now on ebay, and when i say immaculate it looked like that it had never been ridden at all.
But i cant tell you which bike to have as it is all down to personal preference the best thing to do is test ride the bikes that you are cosidering, but the beta from 07 onwards if it is in good nick is a good buy